Duck tape is NOT a mispronounciation of duct tape. Duck tape is the original name of the tape from when it was first invented and used by the military. Only, when people started using duck tape to repair ducts, it got the name duct tape.

Duck tape sucks for repairing ducts because it falls off after a while. The officially recommended tape for repairing ducts is foil tape.

Duck tape is used in movies extremely often. A few examples:
- Panic Room
- American Pie: The Wedding
- Frailty